Bending brake



Aug 11,1925. 1,549,090

` T. J. KELLEHER BENDING BRAKE Filed April '7, 1924 2 Sheets-Sheet 2 STATES- eerenr ePrice.

\ THOMASJ. KEI4LEQHIEflR-,` 0l? CHICAGO, ILLINOIS.

\ Y BENDING BRAKE,` y i Application filed April 7, 1924. S`era1 No. 704,715. l

To all 'whom t may concern:

Be it known that I, THOMAS J. KELLEHER, a citizen of the United States, and a resident of Chicago, in the county of Cook and State of Illinois, have invented certain new and useful Improvements in Bending Brakes, of which the following, when taken in connection with the drawings accompanying and forming a partrhereof, is a specification.

This invention relates to improvements in that class of machines which are used .for bending. and curving sheet metal and metal bars, and by means of which sheet metal of large size and of considerable thickness may be bent or folded, as wellvas metal bars, also of considerable thickness.

Among the objects of the invention are to obtain brakes of great strength and rigidity, which are built up of a small number of parts or pieces to obtain, respectively, the bed, the upper jaw, and the apron or leaf of the brake; each thereof when completed, forming an integral mass; to obtain a brake which is durable and not liable to break or get out of order; and the several members thereof are not liable to be distorted when used on what is termed heavy material; to materially reduce the initial cost of bending brakes, and to obtain a bending brake which is readily understood and easily operated by men skilled in the 'art of bending sheet and bar metal.

I obtain the objects recited by the use of different qualities or kinds, as well as of different thickness, of steel in the construction; and by the means employed in joiningthe several elements comprised in eachof the members of the brake; thereby securing the requisite strength, whilel obtaining a reduction in the weight of the brake.

In the drawings referred to Figure 1 is a front elevation of a bending brake embodying this invention;

Fig. 2 is a rear elevationof the bending brake which is illustrated in Fig. 1;

Fig. 3 is an end elevationof said bending brake; y

Fig. 4 is a vertical section of the forward end of the bed and movable upper jaw, and the upper portion of the apron or bending leaf of the brake, on line 4-4 of Fig. 1, viewed as indicated by arrows;

Fig. 5 is a horizontal section of one end of the apron, on line 5--5 of Fig. 1, viewed as.

indicated by arrows; and

Fig. 6 is a vertical section of a modified construction of the lower member of the clamping jaw` and of the thrust receiving bar of the apron of the brake.

A. reference character applied to designate a given part indicates said part throughout the several figures of the drawings where-ver the same appears.

1, 2, represent the supporting legs of the l brake; 3 represents a horizontal base member, to which the lower ends of legs 1,2, are secured, Vas by rivets 3a, 3a; and 4, 4, represent diagonally extending braceswhich are secured at their lower ends to the horizontal base members 3, 3, as by bolts or rivets 4, 4a, and to the legs, as by bolts or rivets 4b', 4b, (seeFigs. 2 and-3), and 4C, 4C. 5, 5, Figs. 1 and 3, represent heads, preferably of cast steel, towhich the ends of the bed of the brake are secured. Said bed is secured adjacent to its ends on the frame composed of the legs, the horizontal base members (3, 3,), and the braces 4, 4, hereinbefore described. 6 represents the bed ,of the brake, which is preferably made of sheet steel, and 7 the lower jaw, preferably made lof highlyv carbonized steel. The ends of the bed 6 are secured to said heads 5, 5, by rods 8, 8, which are respectively weldedtosaid heads and to said bed, v(see Fig. 3). The bed 6 is secured to the upper `end of the frame composed of the legs, the. horizontal members 3, 3, and

braces 4, 4, by rods 6a, 6a,Fig. 4, which are welded to the upper ends of said legs and to the underside of said bed. The lower jaw 7 is secured to the bed 6 by rods 9, 9, which are welded to said jaw and to said bed, (see Fig.

l 4). The heads 5, 5, are eXtendedat 10, Fig.

3, to form parts of a hinge to which the part 11, forming the remainder of the hinge, and supporting the hereinafter described apron or bending leaf, is pivotally joined by pintles 12.. The apron or turning leaf of the brake consists of heads 13, 13, on the upper ends of whichthe described hinge members 11, 11, are respectively positioned, said hinge members being integral with said head, and preferably made of cast steel; the

metal plate member 14, preferably of sheet steel; the bending member 15, preferably istat-eo.

made of highly carbonized steel; and the curved plate 16, preferably made of sheet steel. The upper edge of plate member 14 is secured to the lower edge of the bending member 15, by the rods 157, 17, (Fig. 4) which are, respectively, welded to said members 14, 15; and the ends of said members 14,

'berl 15 than canotherwise be dene.

15, aresecured to heads 13, 1?),fby'-v rods`17a, 17a, which are welded to said head 13,.and t0 said plate member 14,.and,said bending member 15, respectively: and the curved plate 16 is secured tobending member 15, by rods 18, 19, which are, respectively welded to said member 15 andp'late '16. .The forward end of the lower jaw 7 is bevelled, as at 20,-Fig. 4, andthe upperend 0r edge of Inemberl is':correspondingly bevelled, as-at 21. The upper edge, (22) of member 15'receives thethrustwhen,material (as 52) secured betweenthe lower jaw `7 and the here-Y inafter described upp'erjaw, .is `bent and the purpose of the bevelled edges-20,` 21, is'to enable meto use a'.greaterxthickness in mein- Where exceedinglyv heavy metal is tobe bent,-the member -may `be reinforced in the ordina-ry way; by attachingl a` steel ;bar 'and .anAV angle ironitolthe-faee thereof, the position ofsaid 4steelbar and angle `ironvbeing indicated in Fig4, by broken'lines 23, 24,1butsaidlbar and vangler ironJ-an'd the:v attaching thereofA to thejben-ding' member Vof Ythe apron which receives the'thrust of bendingV or .folding mayteiialin,the.`operation oftheibrake ferins'no paiitlofmiyy invention. I find, however, that by constructing'thexlower jaw lof highly carboniz'edsteel `and as hereinbefore recited with'. the forward end i of member `7 bevelled "as-at 20,.and the upperend ofthe thrust or bending member 15of the apron bevelled, as a-t21,'whiletheiupper.edge 22 of said memr ber C15 ispar'allelwit-hthe lower edge of said 1neniber,mnch thicker rand-heavier sheet and r 4fba'r :metal mayfbe bent or formed by the brak'e,-without'the use ofsteel lplate 23 and angle 24,than,` so fariasv Ifa'm aware, can be' do'ne .byany previous construction of said apron.

Theup'per jaw comprisest-he heads 25, `25,

which'isprefer'ably of cast steel, the horizon-Y tal1tblex26, `whichuisfpreferably of sheet steel; said :head 4secured lto the l ends ofy said table -bys rods 27, 28; said .rods lbeing welded to2saidhcads'25, 25 an'd'table126. Said upper jaw also includes the inclined plate 29, which, atiits lower. side islsecured tothe forward side o'redge of tablef26 by rods 30, 31, which `are'weldedlto Asaid table `26 and in-v lclined plate'29.v The upper lj awvr also includesy strnts32, 32, the 'lowerendsiofwhich are secured to'ftable 26, "by rods,34,l35, which are,

respectively, welded tosaid'table 26 and toy cludestlie stress A.receiving :bar 38, `which -iisv madefofhighly=.caldionized'steel, .and `is bev-v elled fatithefiforwardfiedge'aorside zthereof, as at 39, F1g. 4, so that the surface of said edge .clined plate 29.

is in the same plane as the surface of in- Said bar 38 is rigidly secured to the forward side of table 26, by rods 40, 41, which'are, respectively, welded to said tab-le 26and to said stress receiving member 38.

42 represents a pin or pivot which is rigidly secured in head 25; and extended into slot 43 in member 44, and said member 44 being rigidly secured'to head 5, as by bolt 45, (see Figs. 3 and 46, `46, represent rods which are welded tothe heads 25, 25, and to the endsY ofthe inclined plate 29, to join said heads to said inclined'plates. The forward end of'thelupp'er jaw is movably connected to the lower jaw of the brake in the ordinary way,as by a link, 47, at each end of the brake, which is pivotally mounted on head 5, asbybolt 48, and is connected to the upper jaw by eccentric 49, which fits in a corresponding aperture. in lever 50, said lever `being pivotally mounted on head 25, as by bolt 51. The stress receiving member 38 is forced down onto a bar or: sheet of metal placedon lower jaw member 7, as say, 52, Fig. 4, by 'turninglever 50, Fig. 3, in the direction indicated by the arrow 53. 54 repre'- sents a counterweight on rod 55, said rod being secured tothe apron or bending leaf by inserting the lower end vthereof in socket 56, in theordinary way of counter-balancing the apron.

In theV modified construction illustrated in Fig. 6, the plate 14a, forming an element of the apron, is joined to the lower side or edge of the thrust'receiving bar, 15a, in relative position te obtain' ledge or shoulder 14, on which the lower side or edge of plate 23, (when said plate is used), may rest when secured thereto as is indicated by broken lines in F ig. 4. rlvhe upper' side, 22, of the thrust receiving` bar is retained,as herein before described, but at the rear of said side there isa wall,f22, which is in a plane parallel with the planes in which the front and rearf surfaces of said bar are positioned; and the upper side or edge of plate 16 is secured to the inclined face of said bar which extends fromthe bottom edge of said wall 22, and corresponds with the inclined face 21 (Fig. 4), hereinbeforedescribed, by rods 18l and 19a, which are welded to said inclined face and to said plate,-respectively.

The Vbar 7", forming the lower member of Vthe clamping jaw of the brake is provided at it's for ward" edge or side, with face 20, which issubstantially at right angles to the upper and under faces of said member 7,

,and with the inclined face 20h, which correclamping jaw of the brake, and rods welded to said bed and to said bar to rigidly join said bar and bed, in combination with an apron comprising additional heads respectively extended to obtain a. hinge member arranged to be pivotally joined to said first named hinge member', a metal plate and a thrust receiving bar, and rods respectively welded to said additional heads, said plate and said bar, to rigidly join said heads, plate and bar.

2. In a bending brake, a supporting frame, a bed rigidly secured on said frame, heads at the ends of said bed, said heads respectively extended to form a hinge member, rods welded to said bed and to said heads to rigidly join said heads to said ends of the bed, a bar on the forward side of said bed arranged to form the lower member of the clamping jaw of the brake, said bar bevelled on the under side ofV the'front edge thereof, and rods welded to said bed and to said bar to rigidly join said bar and bed, in combination with an apron comprising additional heads respectively extended to obtain a hinge member arranged to be pivotally joined to said first named hinge member', a metal plate and a thrust receiving bar, the front portion of the upper edge of said thrust receiving bar in a plane at a right angle to the sides thereof, and the rear portion of said upper edge bevelled to correspond with the bevel on said first named bar, and rods respectively welded to said additional heads, said plate and said thrust resisting bar, to rigidly join said heads, plate and bar. Y

3. In a bending brake, a supporting frame, a bed rigidly secured on'said frame, heads at the ends of said bed, rods welded to said bed and to said heads, to rigidly join said heads to said ends of the bed, a bar on the forward side of said bed arranged to form the lower member of the clamping jaw of the brake, and rods welded to said bed and to said bar to rigidly join said bar and said bed, in combination with a movable upper member comprising heads, a horizontal metal plate, an inclined metal plate and a thrust resisting bar the forward edge whereof is bevelled in a plane substantially correspondin of said lnclined plate, said bar arranged to form the upper member of the clamping jaw of the brake, and rods welded to said plates, said heads, and said bar to rigidly join said plates, bar and heads.

4. In a bending brake, the combination of a vsupporting frame, a bed rigidly secured to said frame, heads at the ends of said bed, a bar on the forward side of said bed arranged to form the lower member of the clamping aw of said brake, and rods welded to said bed, said heads and said bar, respectively, said heads extended to form a hinge member, an apron comprising heads respectively extended to form ahinge member to co-act with said first named hinge member, a plate and a thrust resisting bar, and rods welded to said last named heads, said plate and said thrust resisting bar, and a movable upper member also comprising heads, a substantially horizontal plate, an inclined plate and a thrust resisting bar the forward edge whereof is bevelled to substantially correspond with the plane of the upper face of said inclined plate and arranged to form the upper member of the clamping jaw of the brake, and rods welded to said last named heads, said plates and said bar.

5. In a bending brake, the combination of a supporting frame, a bed rigidly secured on said frame, heads at the ends of said bed, a bar on the forward side of said bed arranged to form the lower member of the clamping jaw of said brake, and rods welded to said bed, said heads and said bar, respectively, said heads extended to respectively form a hinge member, an apron comprising heads respectively extended to form a hinge member to co-act with said iirst named hinge member and pivotally attached thereto, a plate and a thrust resisting bar, and rods welded to said last named heads, said plate and said thrust resisting bar, said bar forming the lower member of the jaw of the brake and said thrust resisting bar correspondingly bevelled on adjacent edges thereof, and a movable upper member also comprising heads, a substantially horizont-al plate, an inclined plate and a thrust resisting bar, the forward edge whereof is bevelled to substantially correspond with theV plane of the upper face of said inclined plate, said bar arranged to form the upper member of the clamping liaw of the brake, and rods welded to said last named head, said plates and said bar.

THOMAS J. KELLEI-IER.

with the plane of the upper sided i 

